Below this are 'golden' results to check for consistency across platforms.  Overflow behavior is not necessarily what we want

uint8 conversions
minus1_32 255
minus1_64 255
p32_plus4k_plus1 255
p64_plus4k_plus1 255
n32_minus4k 0
n64_minus4k 0
inf_32 255
inf_64 255
ninf_32 0
ninf_64 0
u64_plus4k_plus1_64 255
u64_plust44_plus1_32 255
u8plus2 1
p8minus1 126
n8plus2 130
n8minusone 127

int8 conversions
minus1_32 -1
minus1_64 -1
p32_plus4k_plus1 -1
p64_plus4k_plus1 -1
n32_minus4k 0
n64_minus4k 0
inf_32 -1
inf_64 -1
ninf_32 0
ninf_64 0
u64_plus4k_plus1_64 -1
u64_plust44_plus1_32 -1
u8plus2 1
p8minus1 126
n8plus2 -126
n8minusone 127